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/* ttyname_r.c - A ttyname_r() replacement.
Copyright (C) 2003, 2004 g10 Code GmbH
This file is part of GPGME.
GPGME is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of
the License, or (at your option) any later version.
GPGME is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
#if HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#warning ttyname is not thread-safe, and ttyname_r is missing
int
ttyname_r (int fd, char *buf, size_t buflen)
{
char *tty;
#if HAVE_W32_SYSTEM
/* We use this default one for now. AFAICS we only need it to be
passed to gpg and in turn to pinentry. Providing a replacement
is needed because elsewhere we bail out on error. If we
eventually implement a pinentry for Windows it is uinlikely that
we need a real tty at all. */
tty = "/dev/tty";
#else
tty = ttyname (fd);
if (!tty)
return errno;
#endif
strncpy (buf, tty, buflen);
buf[buflen - 1] = '\0';
return (strlen (tty) >= buflen) ? ERANGE : 0;
}
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